Showing papers on "Key distribution in wireless sensor networks published in 1988"

A Distributed Sensor Architecture For Advanced Aerospace Systems

Abstract: The Distributed Sensor Architecture (DSA) has been developed to couple knowledge-based processing with integrated sensors technology to provide coherent and efficient treatment of information generated by multiple sensors. In this architecture multiple smart sensors are serviced by a knowledge-based sensor supervisor to process sensor-related data as an integrated sensor group. Multiple sensor groups can be combined to form a reconfigurable, fault tolerant sensor fusion framework. The role and topology of this architecture are discussed. An example application of DSA sensor data fusion is presented.

Sensor Fusion Applied To System Performance Under Sensor Failures

Abstract: System performance and reliability, given a sensor failure, can be improved by the use of multiple sensors of different types. A failure may be due to loss of information of any type. In order to use multiple sensors, it is necessary to perform local estimation, combine local estimations in a central processor, and to detect, isolate, and accommodate sensor failures. Methods for attacking these problems are generally known as sensor fusion. The general sensor fusion equations are set up showing how to construct local estimators, the central processing (fusing) algorithm, and "outer logic" for dealing with sensor failure. In addition application of the theory is demonstrated through simulation, with generic sensors employing non-linear models. The results show the detection, isolation and accommodation of sensor failures. Based upon this study, the concept of sensor fusion shows promise in making significant improvement in many systems employing multiple sensors.